US 11,858,049 B2
Cemented carbide and tool containing the same
Yasuki Kido, Osaka (JP); Katsumi Okamura, Osaka (JP); and Chiaki Tokuda, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/792,711
Filed by Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed Jan. 19, 2022, PCT No. PCT/JP2022/001805
§ 371(c)(1), (2) Date Jul. 14, 2022,
PCT Pub. No. WO2023/139695, PCT Pub. Date Jul. 27, 2023.
Prior Publication US 2023/0278109 A1, Sep. 7, 2023
Int. Cl. B23B 27/14 (2006.01); C22C 29/00 (2006.01); C22C 29/02 (2006.01)
CPC B23B 27/14 (2013.01) [C22C 29/005 (2013.01); C22C 29/02 (2013.01); B23B 2224/28 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A cemented carbide composed of a first hard phase, a second hard phase and a binder phase,
wherein the first hard phase is composed of tungsten carbide particles,
the second hard phase is composed of at least one first compound selected from the group consisting of TiNbC, TiNbN and TiNbCN,
the second hard phase has an average particle diameter of no more than 0.1 μm,
the second hard phase has a dispersity of no more than 0.7,
the second hard phase has a content of no less than 0.1 vol % and no more than 15 vol %,
the binder phase contains at least one first element selected from the group consisting of iron, cobalt and nickel, and
the binder phase has a content of no less than 0.1 vol % and no more than 20 vol %.